Filter DC and amplifying AC - piezo sensor

Thread Starter

Agren

Joined Apr 4, 2018
1
I have a piezoelectric sensor that will have a weak AC signal superimposed on a DC signal. The DC signal will be around 5V and the AC signal only mV and with a frequency of 100kHz. Can you recommend a circuit to filter out the DC and to amplify the AC 100 times?
 
Last edited:

ericgibbs

Joined Jan 29, 2010
11,080
hi Agren,
Welcome to AAC.
One option would be using a coupling capacitor, which will block the DC component and allow through the AC component.
Post a sketch of the piezo circuit, we can then suggest solutions.
E
 
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